People are advised to be _____ towards the health concerns of their dear ones while burning firecrackers to celebrate the festival, for they contain harmful chemicals．

After reading the        school report, Tom really felt        .

She started laughing loudly when I began to sing，which made me feel very________.

Children exposed to air pollution are more       to suffering from different diseases.

---Our family will go to Australia for a holiday.---Oh, really? That sounds ________!